Structural color generation: from layered thin films to optical metasurfaces.

Area of Science:

• Optics and Photonics
• Materials Science
• Nanotechnology

Background:

• Structural coloration, based on light-nanostructure interactions, offers superior spatial resolution, stability, and environmental benefits compared to pigment-based colors.
• Recent advancements focus on layered thin films and optical metasurfaces for generating vibrant and functional colors.

Purpose of the Study:

• To review the fundamentals of structural coloration, including color science and spaces.
• To elaborate on physical mechanisms like Fabry-Pérot, photonic crystal, guided mode, plasmon, and Mie resonances.
• To discuss optimization, fabrication, and device design for dynamic structural color displays.

Main Methods:

• Review of fundamental color science and color spaces.
• Elaboration on physical mechanisms: Fabry-Pérot, photonic crystal, guided mode, plasmon, and Mie resonances.
• Discussion of optimization strategies, large-scale fabrication techniques, and dynamic display designs.

Main Results:

• Comprehensive overview of structural color generation principles.
• Detailed explanation of various resonant optical phenomena enabling structural color.
• Exploration of methods for efficient parameter searching and cost-effective manufacturing.

Conclusions:

• Structural coloration presents a promising alternative to conventional colorants with significant advantages.
• The review highlights key mechanisms, fabrication advancements, and diverse application potentials.
• Future directions include dynamic displays and applications in printing, sensing, and advanced photovoltaics.